fix the file read

there may appear a error:
UnicodeDecodeError: 'gbk' codec can't decode byte 0xaf in position 379: illegal multibyte sequence

tools/program.py

@@ -89,13 +89,13 @@ def load_config(file_path):
     merge_config(default_config)
     _, ext = os.path.splitext(file_path)
     assert ext in ['.yml', '.yaml'], "only support yaml files for now"
-    merge_config(yaml.load(open(file_path), Loader=yaml.Loader))
+    merge_config(yaml.load(open(file_path, 'rb'), Loader=yaml.Loader))
     assert "reader_yml" in global_config['Global'],\
         "absence reader_yml in global"
     reader_file_path = global_config['Global']['reader_yml']
     _, ext = os.path.splitext(reader_file_path)
     assert ext in ['.yml', '.yaml'], "only support yaml files for reader"
-    merge_config(yaml.load(open(reader_file_path), Loader=yaml.Loader))
+    merge_config(yaml.load(open(reader_file_path, 'rb'), Loader=yaml.Loader))
     return global_config